1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <internal/cpumap.h> 4 #include "../../../util/cpumap.h" 5 #include "../../../util/header.h" 6 #include "../../../util/pmu.h" 7 #include "../../../util/pmus.h" 8 #include <api/fs/fs.h> 9 #include <math.h> 10 11 const struct pmu_metrics_table *pmu_metrics_table__find(void) 12 { 13 struct perf_pmu *pmu; 14 15 /* Metrics aren't currently supported on heterogeneous Arm systems */ 16 if (perf_pmus__num_core_pmus() > 1) 17 return NULL; 18 19 /* Doesn't matter which one here because they'll all be the same */ 20 pmu = perf_pmus__find_core_pmu(); 21 if (pmu) 22 return perf_pmu__find_metrics_table(pmu); 23 24 return NULL; 25 } 26 27 double perf_pmu__cpu_slots_per_cycle(void) 28 { 29 char path[PATH_MAX]; 30 unsigned long long slots = 0; 31 struct perf_pmu *pmu = perf_pmus__find_core_pmu(); 32 33 if (pmu) { 34 perf_pmu__pathname_scnprintf(path, sizeof(path), 35 pmu->name, "caps/slots"); 36 /* 37 * The value of slots is not greater than 32 bits, but 38 * filename__read_int can't read value with 0x prefix, 39 * so use filename__read_ull instead. 40 */ 41 filename__read_ull(path, &slots); 42 } 43 44 return slots ? (double)slots : NAN; 45 } 46